package second;public class B {    public static void main(String[] args){        C c = new C();        c.i = 200;        c.haha();        System.out.println("==========");        C cl = (C)c.clone();        cl.i = 500;        cl.haha();        c.haha();    }}

package second;class C implements Cloneable{ //实现克隆接口    public int i = 100;    void haha() {        System.out.println(i);    }    public Object clone(){        C handler = null;        try{            handler = (C)super.clone();        }catch(CloneNotSupportedException e){            e.printStackTrace();        }        return handler;    }}

200==========500200